I believe the 659 has 8-channel Ext. Input. In that case you would run 6 rca, analog lines from the Oppo's analog out to the Yamaha's Ext. Input. Hook up your digital optical to the DVD port and the analog stuff to the Ext. Inputs. So you'd watch DVD's through DVD mode and listen to CD's/SACD's/DVD-A's through the Ext. Input mode. You simply need to change the mode, not cables. Even if the player sends it through both interconnects, the receiver is only processing one because of the mode.